Better than nothing but not really usefull. The network tab is useless. It is empty when the extension starts and the extension will disappear when you reload page. So only lengthy deferred loading will show up. I guess this is the same for js errors.
Source code has no color highlighting (listed as a feature ???) and you can't select parts of text.
Console has no code completion.
So what is left ? You can execute js on the fly and you can browse the content and cut/paste nodes.

Can't say I don't recommend this since it's the only dev tool on mobile, thanks for brings the ability to inspect but why there's only a copy button for node inner html? I can see id/class/random-attribute of a node but can't copy them unless copy the whole thing and pick the info I need in another editor, that's tedious...I mean, frankly speaking, stupid

It doesn't appear when a site is using a huge overlay (which is what I installed this for, to delete that element). You may need to use a stupid high zIndex or something.

For others having trouble installing, I did it on beta, after enabling and adding the collection where the app reboots, you then need to go into settings->addons and hit the little plus. This last step isn't mentioned on the mdn blogpost. Then it turns up in the trippledot->addons on every tab.

It lets me inspect any page in firefox android but I can't edit anything in that inspect than what's the point of it so can you please update it so we can also edit things in inspect.

+: Idea is good.

- Unable to install add-on. Tried on following:

1. Firefox for Android (version 108.1.0 (Build #2015920443))

2. Firefox Nightly (version 110.0a1 (Build #2015923371)